Power loom



Nov. 12, 1963 Y B. cosTA FONT 3,110,327

POWER LOOM Filed May 16, 1962 j 8 Sheets-Sheet 1 HIM Nov. 12, 1963 B. COSTA FONT 3,110,327

' POWER LOOM Filed May 16, .1962 8 Sheets-Sheet 2 Nov. 12, 1963 B. COSTA FONT' 3,110,327

POWER LOOM Filed May 16, 1962 s Sheets-Sheet s Nov. '12, 1963 B. COSTA FONT 3,110,327

POWER LOOM Filed May 16, 1962 I 8 Sheets-Sheet 4 Nov. 12, 1963 B. COSTA FONT 3,110,327

POWER LOOM Filed May 16, 1962 8 Sheets-Sheet 5 Nov. 12, 1963 B. cosTA FONT 3,110,327

POWER LOOM v Filed May 16, 1962 v 8 Sheets-Sheet 6 Nov. 12, 1963 B. COSTA FONT 3,110,327

. POWER LOOM Filed May 16, 1962 f s Sheets-Sheet 7 FIG. 7

Nov. 12, 1963 B. COSTA FONT 3,110,327

POWER LOOM Filed May 16, 1962 a Sheets-Sheet a United States Patent 3,110,327 POWER 1.60M Buenaventura Costa Font, Q'Jaspe. 33, Barcelona, Spain Filed May 16, 1962, Ser. No. 195,288 1 (Ilaim. (1. 139-199) This invention relates to power looms, and more particularly to power looms or the type having a divided sley-board or batten with fixed end portions between which oscillates a movable central portion or sley between a beating-up position and a picking position.

This application is a continuation-in-part of my copending application, Serial No. 800,890, filed March 20, 1959, now abandoned.

It is a principal object of the invention to provide an improved power loom construction of divided batten type.

It is a further object of my invention to provide an improved power loorn wherein a movable sley is afforded a generally improved movement.

It is still another object of the invention to provide an improved loom wherein a movable sley is given a precise dwell over an extendind period of time in order to provide improved operating characteristics in looms of the divided batten type.

Yet, another object of the invention is to provide an improved loom wherein features are incorporated to enable a shuttle to pass unhindered from one end of the associated sley to the other in looms of the divided batten Still another object of the invention is to provide an improved loom construction wherein shuttle friction is markedly reduced.

A further object of the invention is to provide a loom structure wherein the weight of the batten and/or sley can be substantially reduced.

Still a further object of the invention is to provide for adequate time during which to make shuttle changes in a power loom.

Yet a further object of the invention is to provide an improved loom structure wherein vibration is substantially decreased.

Still a further object of the invention is to provide an improved loom structure wherein the force necessary for propelling a shuttle can be substantially reduced.

To acmeve the above and other of the objects of the invention, there is proposed in accordance with the invention, a power loom of the type comprising a batten including fixed end portions with fixed shuttle boxes mounted on said end portions. Moreover, there is provided a middle portion or sley which bears a reed and which is mounted for oscillatory movement between a beating-up position and a picking position in the'latter of which, the middle portion is in register with the aforesaid end portions. To the aforesaid middle portion is rigidly connected a member or sword which controls movement of the middle portion. Means is provided supporting the sword for pivotal movement about a determinable axis and a lever is pivoted to the middle portion and is controlled through the intermediary of a first link driven by a first crank. Additionally, there is provided a second crank and link combination, the second link being pivoted to the above-noted lever at a position spaced from the first link and at a position which is more remote from the aforesaid middle portion than is the first link. Finally, means is provided to rotate the cranks at different speeds, the second crank being preferably rotated at a speed which is substantially greater than that of the first crank.

In a preferred embodiment of the invention, the second crank has an effective diameter which is about twice that of the first crank, while the links have a length ratio, such that, the second crank and link have a throw which Patented. Nov. 12, 1953 is about one and a half times that of the first crank and lmk. At the same time, the second link is pivoted to the aforesaid lever at a position which is about three times the distance from the middle portion or sley than is the first link.

It is a feature of the invention to control the movement of a sley by the use of a sword, or the like, which is rigidly connected thereto and which thereby precisely determines the movement which can be imparted to the sley, while at the same time, there is also connected to the sley in pivotal manner, a lever which is employed to drive the sley through an oscillatory movement between beating-up and picking positions.

A further feature of the invention is that there is provided in accordance with the teachings thereof, a dwell period which is maintained through at least about 280 of revolution of the faster of the two said cranks.

Still a further feature of the invention is the provision of shuttle boxes which are mounted fixedly to the associated frame and, therefore, facilitate all shuttle operations which are effected in connection with the operation of the loorn.

It is to be noted that the invention advantageously provides for a minimizing of departure from a straight line of movement of the sley of a loom, this being effected by the use of a sword rigidly attached to the sley and pivotable about an axis parallel to the same.

Other objects, features and advantages of the invention will be apparent from the following detailed description of a preferred embodiment thereof, as illustrated in the accompanying drawing in which:

FIG. 1 is a front view of the left-hand side of a power loom provided in accordance with a preferred embodiment of the invention;

FIG. 2 is a sectional view taken along line I-I in FIG. 1; and

FIGS. 3-8 diagrammatically illustrate the positional changes of the elements of the loom shown in FIGS. 1 and 2.

The loom illustrated in FIGS. 1 and 2, comprises generally, a batten it including two fixed and spaced end portions 12, only one of which is shown in the drawing. Said end portions 12 constitute a fixed frame relative to which movement of the other elements of the loom takes place.

Mounted atop each end portion 12 is a fixed shuttle box 14 within which is positioned a shuttle 15 adapted for being impelled by a means (not shown) from one end of the loom to the other at a time during which the sley is in register with the end portions 12, as Will be described in greater detail hereinafter.

Power for the loom is provided by a motor 18 connected by means of a shaft 20 to a train of gears 22, 24, 2.6 and 28, which may be of such diameters provided that a predetermi ed speed ratio, hereinafter disclosed in greater detail, is maintained.

It will be noted that the gear 22 drives a shaft 39, whereas gear 28 drives a shaft 32, said shafts being respectively journalled in bearings 34 and 36, which in turn are supported in a frame member 38.

The illustrated power loom is further provided with a middle portion or sley 40, atop which is conventionally mounted a reed 42.

When the middle portion lli is in register with the end portions 12 and, more particularly, with the fixed shuttle boxes 1d thereon, a picking period is established during which the shuttle i6 may be impelled through the resulting shed. This per se is a conventional operation which need not be described in greater detail herein.

According to the invention, however, the improved construction of the loom, an example of which is illustrated in the drawing, provides for a substantial dwell period during which the sley 40 is maintained in perfect registration withthe shuttle box 14, this dwell period being extended for a sufiicient period of time to enable all of the benefits described above to be achieved in a cordance with the invention.

More particularly, there is provided a sword or control member 44 rigidly afiixed by means of a connection 415 to the sley 4t) and pivoted by a pin 43 to the frame member 33 for rotation about an axis 50, which is preferably arranged horizontally to the floor or other such support 52. The use of the sword or control member 44 assures that the sley 4'9 can move only through a fixed arcuate path which departs only slightly from a rectilinear path, whereby the movement of sley it? can be at all times very precisely predicted. Stated otherwise, any force applied to the sley 49 can cause the same to move only along a fixed path, as determined by the sword 44 which is a rigid member of suitable strength in order for the sword to be able to effect its control.

For purposes of driving sword 44 through said determinable path, there is provided a lever 54 pivotally connected to sley 49 through the intermediary of a yoke 56 and a pin 58, the axis of said pin being parallel to the axis 59 noted above.

Lever 54'is driven *by means of two crank members 69 and 62, which are respectively connected to the lever 54 by means of links 64 and es. 7

More particularly, link 64 is pivoted to lever 54 by means of a pin 68, the axis of which is parallel to axis '50. Furthermore, link 64 is pivoted to crank 69 by means of a pin 76*, the axis of which is also parallel to axis 59. Pin 70 describes an effective circle 72 for the crank arrangement 60, which is related to the effective circle 74 of the crank arrangement 52 in a manner as will be hereinafter indicated in greater detail.

With respect to link 65, this is pivoted to crank arrangement 62 by means of pin 76 which describes the effective circle 74 noted above. Link on is, moreover, connected to the lowermost extremity of lever 54 by a pin 78, pins 76 and 78 being parallel to axis 56 noted above.

According to the preferred embodiment of the invention, the effective diameter of crank arrangement 62 is about two times the diameter of the elfective circle of the crank arrangement 66. At the same time, the pin 63 is spaced from the pin 53 by a distance which is approximately one-third the distance by which pin 78 is spaced from pin 58. Moreover, shaft 39 rotates at twice the speed of shaft 32, crank arrangements 6! and 62, accordingly, rotating with the same relationship. Finally, links 64 and 66 preferably have a length ratio, such that, the throw of cranks 62 and links es is about one and onehalf times the throw of crank 66* and link 64.

The dimensions of a loom constructed in accordance with the teachings of the invention are next given, by way of example, with reference to FIG. 4. Some of the dimensions are given relative to an arbitrary vertical line V,

a which is perpendicular to the supporting floor or bed.

Thus, for example, the distance X in the constructed 'loom, may be 256 mm. whereas the distance Y is 365 mm.,

the distance Y being that which determines whether the sley 443 is in beatingup or picking position, it being noted that the position illustrated in FIG. 4 is the picking position.

The table below gives the remaining dimensions illustrated in FIG. 4 with reference to said constructed embodiment:

Dimension reference: Dimension (mm.)

The operation of the loom will next be described with reference to FIGS. 3-8, wherein are diagrammatically illustrated the various components of the structure described in detail above. 7

In FIG. 3, the sley 4i) and the reed 42, are illustrated in a position of dwell representing the picking position, the sword or control member 44* being illustrated with its fixed pivot 48 and being rigidly connected to said sley 49. The effective circles of the respective cranks are diagrammatically illustrated with respect to aligned coordinates the greater speed of pin '76 with respect to that of pin 7% being illustrated by the fact that the pin 76 has travelled through a 20 angle, as compared with a 40 angle of travel of pin 76. a

In FIG. 5, pin 7% has travelled through an additional 70 angle, whereas pin 76 has travelled through an additional 149" angle. Pin 78 has moved from the right-hand side of pin 4-8 in the drawing, to the left-hand side of the pin Sley 46 due to the movement of pin d3, however, remains fixed in position at distance Y from-line .V.-

In FIG. 6, pin 76 has travelled 206 from the initial position illustrated in PEG. 3 and pin 7i) has travelled from the original position. S-ley 4% remains fixed in the dwell position at distance Y from line V.

in FIG. 7, pin 76 has travelled 280 from its original position, whereas pin 7% has travelled from its original position, sley 40' still remaining in the dwell position. At this time, however, pin 78 has moved back to the right-hand side of pin 48 and pin 68 accompanies pin 73 in this movement. Sword 4-; remains in position without undergoing any movement and distance Y remains unchanged.

In FiG. 8, pin 76 has moved 500 from its original position, whereas pin 76 has moved 250. Sword :4 pivots about pin 48 and sley ill [moves to a new position at distance Y from line V, the dwell period being thus interrupted and the other incidental operations of the loom now being possible.

From what has been described above, it will be apparent that a greatly extended dwell period is provided in accordance with the teachings of the invention during which, a shuttle may be impelled along a sley from one end of the associated shed to the other. Due to the fact that the sley remains in fixed position for so great a period of time, it is possible for the associated shuttle to pass unhindered through the shed defined by the reed 42.

At the same time, with the shuttle boxes fixed to the associated frame, the replacing of the shuttles is greatly facilitated.

Still further, in view of the fact that the sley 4% remains in fixed position, the shuttle to may pass with ease and minimum friction through the aforenoted shed.

The fixed position of the sley during the dwell period,

I assures that there is a minimum of vibration and since there is a minimum of vibration, the mechanical structure of the loom can be such as to minimize the weight and utilization of material therein.

There will now be obvious to those skilled in the art many modifications and variations of the structure set forth above. These modifications and variations will not, however, depart from the scope of the invention as defined by the following claim.

What is claimed is:

A power loom comprising a batten including fixed end portions, fixed shuttle boxes on said end portions, a middle portion between said end portions and mounted for oscillatory movement between a beating-up position and a picking position in which latter position said middle portion is in register with said end portions, a member rigidly connected to and controlling movement of said middle portion, means supporting said member for pivotal movement about a determinable axis, a lever pivoted to said middle portion, a first crank having a determinable axis of rotation parallel to the first said axis, a first link pivoted to and connecting said first crank and lover intermediate the ends of the latter, a second crank having a determinable axis of rotation parallel to the first said axis, said second crank having an effective diameter which is about twice that of said first crank, a second link pivoted to said second crank, said second link being pivoted to said lever at a position spaced from said first link and at about three times the distance from said middle portion than said first link, said links having length ratios such that said second crank and link has a throw which is about References Cited in the file of this patent FOREIGN PATENTS 715,048 Great Britain Sept. 8, 1954 Italy May 28, 1946 I 

